1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * arch/sh/mm/cache-j2.c
4 *
5 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
6 */
7
8#include <linux/init.h>
9#include <linux/mm.h>
10#include <linux/cpumask.h>
11
12#include <asm/cache.h>
13#include <asm/addrspace.h>
14#include <asm/processor.h>
15#include <asm/cacheflush.h>
16#include <asm/io.h>
17
18#define ICACHE_ENABLE	0x1
19#define DCACHE_ENABLE	0x2
20#define CACHE_ENABLE	(ICACHE_ENABLE | DCACHE_ENABLE)
21#define ICACHE_FLUSH	0x100
22#define DCACHE_FLUSH	0x200
23#define CACHE_FLUSH	(ICACHE_FLUSH | DCACHE_FLUSH)
24
25u32 __iomem *j2_ccr_base;
26
27static void j2_flush_icache(void *args)
28{
29	unsigned cpu;
30	for_each_possible_cpu(cpu)
31		__raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu);
32}
33
34static void j2_flush_dcache(void *args)
35{
36	unsigned cpu;
37	for_each_possible_cpu(cpu)
38		__raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu);
39}
40
41static void j2_flush_both(void *args)
42{
43	unsigned cpu;
44	for_each_possible_cpu(cpu)
45		__raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu);
46}
47
48void __init j2_cache_init(void)
49{
50	if (!j2_ccr_base)
51		return;
52
53	local_flush_cache_all = j2_flush_both;
54	local_flush_cache_mm = j2_flush_both;
55	local_flush_cache_dup_mm = j2_flush_both;
56	local_flush_cache_page = j2_flush_both;
57	local_flush_cache_range = j2_flush_both;
58	local_flush_dcache_folio = j2_flush_dcache;
59	local_flush_icache_range = j2_flush_icache;
60	local_flush_icache_folio = j2_flush_icache;
61	local_flush_cache_sigtramp = j2_flush_icache;
62
63	pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base));
64}
65